Orange and Bouygues have given themselves a few extra days to decide whether to proceed with a formal merger plan, but will make a decision by the end of the weekend. The two French operators have failed to agree terms so far, missing their original deadline of March 31, but have promised a final decision this weekend. “The Board acknowledged that the negotiations were not yet sufficiently advanced,” said Orange in a statement. Issues are said to include the price Orange will pay for France’s third operator, and what would be Bouygues’ stake in the new entity, and its board level representation. The companies also need to come up with workable proposals regarding the sale of assets to rivals, in…